test: use operator-generic for kubernetes upstream test
test: use operator-generic for kubernetes upstream test

Also build all operator images by default so the upstream tests will
have the generic image available.

Fixes: 2773d0656e7f ("Implement per-provider operator deployments")
Signed-off-by: André Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>

michi-covalent/cilium,cilium/cilium,cilium-team/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,cilium-team/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium,tklauser/cilium